Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4744171 | Hanging pot suspension system | — | 1988-05-17 |
| 4600425 | Bubbler with protective sleeve or fluid coolant jacket | John F. Krumwiede, Roy M. Sims | 1986-07-15 |
| 4544396 | Method and apparatus for controlling currents in glass melter | John F. Krumwiede, William C. Harrell, James E. Harris | 1985-10-01 |
| 4536205 | Method for controlling currents in glass melter | John F. Krumwiede, William C. Harrell, James E. Harris | 1985-08-20 |